Gurobi 5.0.1 (linux64) logging started Fri Nov 16 08:12:10 2012 Optimize a model with 11654 rows, 4032 columns and 38680 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.32s Presolved: 11715 rows, 4030 columns, 42279 nonzeros Variable types: 0 continuous, 4030 integer (4030 binary) Found heuristic solution: objective 63.0000000 Root relaxation: objective 2.000000e+00, 3031 iterations, 0.10 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 126 63.00000 2.00000 96.8% - 0s H 0 0 53.0000000 2.00000 96.2% - 0s H 0 0 5.0000000 2.00000 60.0% - 0s 0 0 2.66667 0 744 5.00000 2.66667 46.7% - 2s 0 0 2.66667 0 3366 5.00000 2.66667 46.7% - 3s 0 0 2.66667 0 160 5.00000 2.66667 46.7% - 8s 0 0 2.67033 0 3361 5.00000 2.67033 46.6% - 12s 0 0 2.67033 0 3389 5.00000 2.67033 46.6% - 13s 0 0 2.67033 0 3169 5.00000 2.67033 46.6% - 16s 0 0 2.67033 0 3159 5.00000 2.67033 46.6% - 18s 0 0 2.67033 0 3205 5.00000 2.67033 46.6% - 19s 0 0 2.67033 0 3159 5.00000 2.67033 46.6% - 21s 0 0 2.67033 0 3266 5.00000 2.67033 46.6% - 23s 0 0 2.67033 0 3249 5.00000 2.67033 46.6% - 26s 0 0 2.67033 0 3182 5.00000 2.67033 46.6% - 28s 0 0 2.67033 0 3199 5.00000 2.67033 46.6% - 30s 0 0 2.67033 0 3133 5.00000 2.67033 46.6% - 32s 0 0 2.67033 0 3215 5.00000 2.67033 46.6% - 34s 0 0 2.67033 0 3215 5.00000 2.67033 46.6% - 35s 0 2 2.80000 0 3215 5.00000 2.80000 44.0% - 42s * 19 4 11 4.0000000 3.00000 25.0% 629 44s 23 0 cutoff 1 4.00000 4.00000 0.0% 811 46s Cutting planes: Clique: 95 Zero half: 5 Explored 24 nodes (107108 simplex iterations) in 46.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%